プログレッシブ和英中辞典(第4版)の解説
はしゃぐ
〔浮かれ騒ぐ〕make merry;〔上機嫌である〕be in high spirits
子供たちがはしゃぎ回っている
The children are 「romping around [《口》 horsing around/《口》 cutting up].
彼女はいつになくはしゃいでよくしゃべった
She was unusually high-spirited and talkative.
党が選挙に勝ったのはいいが,はしゃぎ過ぎるな
It's fine that the party won the election, but you mustn't make 「too much [《口》 too big a thing] of it.